The NcSTAR Tactical Pistol Red Laser has a frequency of 635-655nm, has a maximum output of less than 5mw, and is a class IIIA laser. The weaver style mount will fit most weaver and Picatinny type rails. It is fully adjustable for windage and elevation. It features an all aluminum construction wit ha black anaodized finish with a side to sided toggle on/off switch. It requires 2 AG13 button cell batteries (included) and includes mounting tools.